成年槟榔叶片及种植土壤养分的含量特征

Nutrient Content in Soil and Leaves of Adult Areca catechu Trees

为槟榔合理施肥提供依据,采用定点观测法研究海南屯昌槟榔主产区土壤和成年槟榔树叶片养分含量及其年度动态变化规律。结果表明:海南屯昌槟榔园土壤整体呈弱酸性,pH为5.50;土壤磷含量极低,仅为5.46mg/kg,槟榔叶片的氮含量最高,磷含量最低,分别为20.24g/kg和0.31g/kg;其含量差异与其自身的养分需求特征有关。槟榔叶片养分含量在年度生长期存在差异,4—9月是槟榔植株需要养分最多和对养分丰缺最敏感的时期,也是施肥的重要时期。

The annual dynamic changes of nutrient content in soil and leaves of adult Areca catechu trees from Tunchang A.catechu producing area were studied by the fixed point observation method to provide the scientific basis for rational fertilization of Areca catechu.Result：pH of the soil in Tunchang A.catechuplantation is 5.50 with a faintly acid and phosphorous content of the soil is 5.46 mg/kg only.The nitrogen and phosphorous content of A.catechuleaves is 20.24 g/kg and 0.31 g/kg respectively and the difference in nutrient content is related to itself nutrient demand characteristics.There is a difference in nutrient content of A.catechuleaves during the annual growth period.Because the maximum nutrient requirement period of A.catechutrees is from April to September,the important fertilization period of A.catechutrees is during April- September also.